US5184490A - Key switch assembly - Google Patents

Key switch assembly Download PDF

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Publication number
US5184490A
US5184490A US07/905,803 US90580392A US5184490A US 5184490 A US5184490 A US 5184490A US 90580392 A US90580392 A US 90580392A US 5184490 A US5184490 A US 5184490A
Authority
US
United States
Prior art keywords
key
guide
lock body
lock cylinder
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/905,803
Other languages
English (en)
Inventor
Hiroyuki Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takigen Manufacturing Co Ltd
Original Assignee
Takigen Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takigen Manufacturing Co Ltd filed Critical Takigen Manufacturing Co Ltd
Assigned to TAKIGEN MANUFACTURING CO., LTD. reassignment TAKIGEN MANUFACTURING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: TAKAHASHI, HIROYUKI
Application granted granted Critical
Publication of US5184490A publication Critical patent/US5184490A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/06—Key inserted and then turned to effect operation of the switch
    • H01H27/08—Key inserted and then turned to effect operation of the switch wherein the key cannot be removed until the switch is returned to its original position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S70/00—Locks
    • Y10S70/30—Switch lock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7051—Using a powered device [e.g., motor]
    • Y10T70/7062—Electrical type [e.g., solenoid]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/7768—Key-removal preventing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/80—Parts, attachments, accessories and adjuncts
    • Y10T70/8432—For key-operated mechanism
    • Y10T70/8595—Key guides, internal

Definitions

  • This invention relates to a key switch assembly and, more particularly, a key switch assembly which can reliably eliminate swinging of a key end and erroneous operation due to incomplete insertion of a key.
  • Japanese Utility Model Publication No. 23650/1979 shows a key switch assembly, which comprises a lock body, a lock cylinder received in a lock cylinder reception bore of the lock body and having an axial key groove and a plurality of radial pin reception bores, the lock body having radial pin reception bores communicating with the pin reception bores of the lock cylinder, driven and drive pins received in the pin reception bores and biased by compression coil springs toward the key groove, a key having one edge formed with operation sections for displacing the point of contact between each driven pin and each drive pin to a position corresponding to the outer periphery of the lock cylinder, and a plurality of switches secured as an axial juxtaposition to the back of the lock body, an end portion of the key rearwardly projecting from the lock cylinder having one side provided with operation sections for depessing actuator pins of the switches and non-operation sections, through which the actuator pins can pass.
  • a swing of the key end from the normal position may result in insufficient depression or failure of depression of an actuator pin of a switch, which is disposed in a deviated position.
  • an erroneous operation signal is possibly supplied to the associated apparatus.
  • a major cause of occurrence of the key swing resides in the play present between the surface of the lock cylinder reception bore and the outer periphery of the lock cylinder. Therefore, it is desired to reduce the play so as to align the axis of the lock cylinder and the axis of the lock cylinder reception bore as much as possible.
  • the lock cylinder is liable to be occasionally unlocked before the key is perfectly inserted to a predetermined extent. If the key is turned in this half inserted state, switches in a zone not reached by the key are not turned on or off at all, and also switches in a zone reached by the key are not turned on or off in a normal fashion, thus possibly providing erroneous operation signals to apparatuses.
  • the minimum unit of key code setting may be made as large as possible.
  • the outer diameter of the lock body and lock cylinder has to be increased to ensure a large number of key codes. This is undesired in the light of the demand for reducing the size and weight of the assembly.
  • An object of the invention is to provide a key switch assembly, which can reliably eliminate the swing of the key end and erroneous operation due to half insertion lock.
  • a key switch assembly which comprises a lock body having a lock cylinder reception bore, a lock cylinder received in the lock cylinder reception bore and having an axial key groove and a plurality of first radial pin reception bores, the lock body having a second radial pin reception bores each in communication with each of the first radial pin reception bores, driven and drive pins received in the first and second radial pin reception bores, compression coil springs biasing the driven and drive pins toward the key groove, a key having one edge formed with a pin operation section for displacing the point of contact between each driven pin and each drive pin to a position corresponding to the outer periphery of the lock cylinder, a plurality of switches secured as an axial juxtaposition to the rear face of the lock body, a guide projecting rearward of the lock body and parallel to the switch juxtaposition, the guide having one side in frictional contact with a side of the key aligned to an extension of a surface of the key groove,
  • the guide extending rearward of the lock cylinder is held parallel to the juxtaposition of the switches, the key has one side held in contact with the side of the guide aligned to the extension of a surface of the key groove, and the axial positioning groove of the key is engaged with the axial positioning ridge of the guide.
  • the guide disk is provided with the restricting notch, with the radius of curvature of the arcuate edge of the restricting notch set to be smaller than the radius of rotation of the key, and the other edge of the key is formed with the escapement groove, which is engaged by the arcuate edge of the guide disk when the key is inserted to a predetermined depth and is turned. If the insertion of the key is imperfect, the start face of the arcuate edge of the guide disk engages with the key, thus reliably preventing key operation in a half inserted state.
  • FIG. 1 is a front view showing an embodiment of the key switch assembly according to the invention with a key removed;
  • FIG. 2 is a back view showing the key switch assembly with the key removed;
  • FIG. 3 is plan view showing the key switch assembly with the key removed
  • FIG. 4 is a botton view showing the key switch assembly with the key removed
  • FIG. 5 is a left side view showing the key switch assembly with the key removed
  • FIG. 6 is a right side view showing the key switch assembly with the key removed
  • FIG. 7 is a sectional view taken along line 7--7 in FIG. 1;
  • FIG. 8 is a sectional view taken along line 8--8 in FIG. 6;
  • FIG. 9 is a sectional view taken along line 9--9 in FIG. 7;
  • FIG. 10 is a right side view showing the key used with the key switch assembly
  • FIG. 11 is a left side view showing the key
  • FIG. 12 is a sectional view taken along line 12--12 in FIG. 11;
  • FIG. 13 is a sectional view taken along line 13--13 in FIG. 11;
  • FIG. 14 is a sectional view taken along line 14--14 in FIG. 11;
  • FIG. 15 is a sectional view corresponding to FIG. 7 but showing the key switch assembly with the key inserted;
  • FIG. 16 is a sectional view taken along line 16--16 in FIG. 15;
  • FIG. 17 is a sectional view taken along line 17--17 in FIG. 15;
  • FIG. 18 is a sectional view taken along line 18--18 in FIG. 15;
  • FIG. 19 is a sectional view corresponding to FIG. 7 but showing the key switch assembly with the key inserted and turned;
  • FIG. 20 is a sectional view taken along line 20--20 in FIG. 19.
  • the illustrated key switch assembly comprises a lock body 1 having a lock cylinder reception bore 2 in which a lock cylinder 3 is received.
  • the lock cylinder 3 has an axial key groove 4 and a plurality of radial pin reception bores 5.
  • the lock body 1 has radial pin reception bores 6 each in communication with each of the radial pin reception bores 5. Driven and drive pins 7 and 8 are received in the radial pin reception bores 5 and 6 and biased by compression coil springs 9 toward the key groove 4.
  • a key 10 has one edge 10a formed with a pin operation section 11, which can effect displacement of the point of contact between each driven pin 7 and drive pin 8 to a position corresponding to the outer periphery 3a of the lock cylinder 3.
  • a plurality of switches 12 are secured as an axial juxtaposition to the back of the lock body 1.
  • a guide 13 projects rearward of the lock body 1 and parallel to the juxtaposition of the switches 12.
  • the guide 13 has its side 13a in frictional contact with a side 10c of the key 10 aligned to an extension of the key groove 4.
  • the side 13a of the guide 13 has an axial positioning ridge 15, which is engaged in an axial positioning groove 14 formed in the side 10c of the key 10.
  • a guide disk 16 is secured to the rear face 1a of the lock body 1.
  • the guide disk 16 has a restricting front face 16a in contact with the rear face 3b of the lock cylinder 3.
  • the guide disk 16 has a restricting notch 17 with an arcuate edge 17a having a radius of curvature smaller than the radius of rotation of the key 10.
  • the key 10 has the other edge 10b formed with an escapement groove 18 engaged by the arcuate edge 17a of the notch 17 when the key 10 is inserted in the assembly to a predetermined depth thereof and is turned.
  • the guide 13 has a stem portion with the outer periphery thereof formed with an escapement groove 32 which is engaged by the arcuate edge 17a.
  • the other side 10c of the key 10 has an end portion formed with operation sections 20 for depressing actuator pins 19 of the switches 12 and non-operation sections, into which the actuator pins 19 can escape.
  • the operation and non-operation sections 20 and 21 are found at positions corresponding to the associated actuator pins 19 of the switches 12, as shown in FIGS. 17 and 18, and the escapement groove 18 of the key is found at a position corresponding to the arcuate edge 17a of the restricting notch 17 of the guide disk 16, as shown in FIG. 16.
  • the operation sections 11 of the key 10 are holding the driven pins 7 displaced outward by a predetermined distance, and the point of contact between each driven pin 7 and each drive pin 8 is flush with the outer periphery 3a of the lock cylinder 3. That is, the lock cylinder 3 is in an unlocked state with respect to the lock body 1.
  • the outer periphery 3a of the lock cylinder 3 has a rear end portion formed with an annular groove 22, in which is engaged an end portion of a lock pin 24 driven and secured in a radial pin bore 23 formed in the lock body, as shown in FIG. 7, thus preventing axial displacement of the lock cylinder 3.
  • the guide disk 16 is secured by two screws 25 to the rear face 1a of the lock body 1, and the switches 12 are secured by two screws 26 to the guide disk 16 and lock body 1.
  • a straight edge 17b extends from the arcuate edge 17a and, as shown in FIG. 20, the side 10d of the key 10 strikes the straight edge 17b, thus limiting the rotational angle of the lock cylinder 3 to 90 degrees.
  • the lock body 1 is inserted through a hole 28 of a mounting panel 27 and clampedly secured to the mounting panel 27 by a nut 30 screwed on its outer peripheral thread 29 and its front end flange 31.
  • the pin reception bores in the lock body 1 are formed across the key groove 4 and open at one end on the outer peripheral thread 29 to facilitate the machining.
  • the guide disk 16 is secured to the rear face 1a of the lock body 1, and the rear face 3b of the lock cylinder 3 is held in contact with the restricting front face 16a of the guide disk 16, thus preventing deviation of the axis of the lock cylinder 3 from the axis of the lock cylinder reception bore 2.
  • the guide 13 extending rearward of the lock cylinder 3 is held parallel to the juxtaposition of the switches 12, the side 10c of the key 10 is held in contact with the side 13a of the guide 13 aligned to the extension of the surface 4a of the key groove 4, and the axial positioning groove 14 of the key 10 is engaged with the axial positioning ridge 15 of the guide 13.
  • the guide disk 16 is provided with the restricting notch 17, with the radius of curvature of the arcuate edge 17a of the restricting notch set to be smaller than the radius of rotation of the key 10, and the other edge 10b of the key 10 is formed with the escapement groove 18, which is engaged by the arcuate edge 17a when the key 10 inserted to a predetermined depth is turned. If the insertion of the key 10 is imperfect, the start face of the arcuate edge 17a of the guide disk 16 engages with the side 10d of the key 10, thus reliably preventing the operation of turning the key 10 in a half inserted state. Therefore, even if the play between the lock cylinder reception bore 2 and lock cylinder 3 is increased, there is no possibility of occurrence of any erroneous operation of any switch 12.

Landscapes

  • Lock And Its Accessories (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
US07/905,803 1992-02-13 1992-06-29 Key switch assembly Expired - Lifetime US5184490A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4-013897[U] 1992-02-13
JP013897U JPH0619239U (ja) 1992-02-13 1992-02-13 キースイッチ装置

Publications (1)

Publication Number Publication Date
US5184490A true US5184490A (en) 1993-02-09

Family

ID=11845967

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/905,803 Expired - Lifetime US5184490A (en) 1992-02-13 1992-06-29 Key switch assembly

Country Status (5)

Country Link
US (1) US5184490A (enrdf_load_stackoverflow)
EP (1) EP0559950B1 (enrdf_load_stackoverflow)
JP (1) JPH0619239U (enrdf_load_stackoverflow)
KR (1) KR0132285B1 (enrdf_load_stackoverflow)
DE (1) DE69209815T2 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511838A (en) * 1994-02-14 1996-04-30 General Motors Corporation Remote latch release disabling device
US5852414A (en) * 1995-01-04 1998-12-22 Yu; Seymour H. 4-way triangular-shaped alphanumeric keyboard
US5870915A (en) * 1994-11-30 1999-02-16 Texas Instruments Incorporated Key lock having inductive key detection and method of construction
US6509823B2 (en) * 1999-12-09 2003-01-21 Ellenberger & Poensgen Gmbh Electrical functional unit, in particular a circuit-breaker, for use in aviation
US6725697B1 (en) * 2002-06-28 2004-04-27 Kkevin P. Leadon Keyway cylinder plug removal tool for a safety deposit box
WO2014090209A1 (de) * 2012-12-14 2014-06-19 Assa Abloy Sicherheitstechnik Gmbh Schlüsselabzugssperre
CN104594724A (zh) * 2015-01-27 2015-05-06 山西鲲鹏智能科技有限公司 智能报警锁芯系统
US10017958B1 (en) * 2014-05-12 2018-07-10 Robert Frydrych Locks inserts and lock assemblies using them
CN111012072A (zh) * 2019-10-17 2020-04-17 四川大学华西医院 一种毒麻药品柜
CN111524739A (zh) * 2020-06-19 2020-08-11 南京苏美达智能技术有限公司 电源开关及自动行走设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002036912A1 (fr) * 2000-10-31 2002-05-10 Tsugio Saito Système de verrouillage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622732A (en) * 1925-11-09 1927-03-29 Harry A Douglas Locking mechanism
US3702550A (en) * 1970-05-12 1972-11-14 Nissan Motor Steering lock device
US3798398A (en) * 1973-01-29 1974-03-19 A Hills Key-receiving lock assemblies and apparatus incorporating such assemblies
US3912888A (en) * 1973-04-18 1975-10-14 Takigen Mfg Co Switch lock assembly
US4198552A (en) * 1977-08-02 1980-04-15 Takigen Seizou Co., Ltd. Key operated switch lock assembly
US5092148A (en) * 1990-08-08 1992-03-03 Rong Long Wang Pry-proof computerized mechanical lock

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1298935A (fr) * 1961-02-28 1962-07-20 Acec Interrupteur-sélecteur à sûreté mécanique
JPS5921129B2 (ja) * 1977-07-11 1984-05-17 株式会社サンポウロツク キ−スイツチ
US4580019A (en) * 1984-04-27 1986-04-01 Takigen Seizou Co., Ltd. Push-rotation type key switch device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622732A (en) * 1925-11-09 1927-03-29 Harry A Douglas Locking mechanism
US3702550A (en) * 1970-05-12 1972-11-14 Nissan Motor Steering lock device
US3798398A (en) * 1973-01-29 1974-03-19 A Hills Key-receiving lock assemblies and apparatus incorporating such assemblies
US3912888A (en) * 1973-04-18 1975-10-14 Takigen Mfg Co Switch lock assembly
US4198552A (en) * 1977-08-02 1980-04-15 Takigen Seizou Co., Ltd. Key operated switch lock assembly
US5092148A (en) * 1990-08-08 1992-03-03 Rong Long Wang Pry-proof computerized mechanical lock

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511838A (en) * 1994-02-14 1996-04-30 General Motors Corporation Remote latch release disabling device
US5870915A (en) * 1994-11-30 1999-02-16 Texas Instruments Incorporated Key lock having inductive key detection and method of construction
US5852414A (en) * 1995-01-04 1998-12-22 Yu; Seymour H. 4-way triangular-shaped alphanumeric keyboard
US6509823B2 (en) * 1999-12-09 2003-01-21 Ellenberger & Poensgen Gmbh Electrical functional unit, in particular a circuit-breaker, for use in aviation
US6725697B1 (en) * 2002-06-28 2004-04-27 Kkevin P. Leadon Keyway cylinder plug removal tool for a safety deposit box
WO2014090209A1 (de) * 2012-12-14 2014-06-19 Assa Abloy Sicherheitstechnik Gmbh Schlüsselabzugssperre
US10017958B1 (en) * 2014-05-12 2018-07-10 Robert Frydrych Locks inserts and lock assemblies using them
CN104594724A (zh) * 2015-01-27 2015-05-06 山西鲲鹏智能科技有限公司 智能报警锁芯系统
CN104594724B (zh) * 2015-01-27 2017-09-26 山西鲲鹏智能科技有限公司 智能报警锁芯系统
CN111012072A (zh) * 2019-10-17 2020-04-17 四川大学华西医院 一种毒麻药品柜
CN111524739A (zh) * 2020-06-19 2020-08-11 南京苏美达智能技术有限公司 电源开关及自动行走设备

Also Published As

Publication number Publication date
EP0559950A2 (en) 1993-09-15
HK1006049A1 (en) 1999-02-05
EP0559950A3 (enrdf_load_stackoverflow) 1994-04-27
KR930018609A (ko) 1993-09-22
DE69209815T2 (de) 1996-08-22
JPH0619239U (ja) 1994-03-11
DE69209815D1 (de) 1996-05-15
KR0132285B1 (ko) 1998-04-24
EP0559950B1 (en) 1996-04-10

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